From b469cfe9fa518d3cea8d21a0416f68db8ea1388d Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Thu, 5 Sep 2019 17:59:14 +0100
Subject: [PATCH] v3d_gem: Kick the clock so firmware knows we are
 using firmware clock interface

Setting the v3d clock to low value allows firmware to handle dvfs in case
where v3d hardware is not being actively used (e.g. console use).

Signed-off-by: popcornmix <popcornmix@gmail.com>
---
 drivers/gpu/drm/v3d/v3d_gem.c | 4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -1129,6 +1129,10 @@ v3d_gem_init(struct drm_device *dev)
 	mutex_init(&v3d->clk_lock);
 	INIT_DELAYED_WORK(&v3d->clk_down_work, v3d_clock_down_work);
 
+	/* kick the clock so firmware knows we are using firmware clock interface */
+	v3d_clock_up_get(v3d);
+	v3d_clock_up_put(v3d);
+
 	/* Note: We don't allocate address 0.  Various bits of HW
 	 * treat 0 as special, such as the occlusion query counters
 	 * where 0 means "disabled".
